Methodologically innovative in its use of mixed-media diary research, this timely book offers a focused sociological study of non-binary people's identities and experiences in the UK. From negotiating a sense of legitimacy when 'not feeling trans enough' to how identities can shift over time, it reveals important nuances of diverse gender identities while offering crucial insights into trans-related healthcare inequalities. The findings of this ground-breaking research mark an important contribution to the wider fields of gender studies, LGBTQ scholarship and medical policy.